code: def get_fixlen_iter(self, start=0):
      for i in range(start, self.data.size(0) - 1, self.bptt):
          yield self.get_batch(i)
  
imports: import os, sys
  import glob
  from collections import Counter, OrderedDict
  import numpy
  import torch
  from utils.vocabulary import Vocab
label_desc: Use image node_id 3 for calling the LMOrderedIterator obj's underlying member method code with example usage: obj.get_fixlen_iter(start) without return types